<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>v-bind</title>
    <style>
        .active{
            border: 1px solid red;
        }
    </style>
</head>
<body>
    <div id="app">
        <img v-bind:src="imgSrc" alt="">
        <br>
        <img :src="imgSrc" alt="" :title="imgTitle + '使用三元表达式!!!'"
        :class="isActive?'active':''" @click="toggleActive">
        <br>
        <img :src="imgSrc" alt="" :title="imgTitle + '使用class!!!'"
        :class={active:isActive} @click="toggleActive">
    </div>

    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <script>
        var app = new Vue({
            el:"#app",
            data:{
                imgSrc:"http://www.itheima.com/images/logo.png",
                imgTitle:"程序员标题",
                isActive:false
            },
            methods: {
                toggleActive:function(){
                    this.isActive = !this.isActive
                }
            }
        })
    </script>
</body>
</html>